Winter storm continues in the West with heavy mountain snow, widespread
damaging winds, and powerful blizzard conditions in the Sierra Nevada...

Accumulating snowfall near the Canadian border across Montana and North
Dakota with a wintry mix from North Dakota to northern Minnesota.

A coastal storm with widespread rainfall will exit New England on
Sunday but another coastal storm is forecast to bring another round of
rain into the Mid-Atlantic coast later on Monday.

Much above average, Spring-like temperatures shifting from the
Plains/Midwest into the Northeast as Critical Fire Weather threat persists
in the central/southern High Plains.

A significant winter storm remains in progress across much of the West,
including dangerous, blizzard conditions for the Sierra Nevada as an
amplified upper-level trough forces its way into the western U.S. A
multi-day influx of moisture from the Pacific interacting with colder air
pushing southward from Canada is bringing heavy higher elevation, mountain
snows across most of the ranges of the Pacific Northwest, northern/central
California, the Great Basin, and the northern/central Rockies. The
heaviest precipitation associated with this system will continue to impact
these areas through tonight into Sunday morning. In addition, widespread
wind-related advisories and warnings remain in effect across much of the
greater western U.S. as wind gusts reach upwards of 55 mph, with gusts as
high as 75 mph for higher elevations, leading to the risk of downed trees
and power lines. The combination of snow and high winds is most intense in
the Sierra Nevada into tonight, where heavy snow rates exceeding 3" per
hour and winds gusting over 100 mph are causing significant blowing,
drifting snow and whiteout conditions, making travel impossible through
the area. Additional 2 feet of snow, on top of a few feet of recent
snowfall, can be expected along the Sierra Nevada through Sunday. The most
intense snow and wind should begin to wind down later on Sunday but
additional energy from the Pacific will keep light to moderate
precipitation in place through Monday across the northwestern U.S. through
Monday, with another system forecast to reach northern California later on
Monday. High temperatures will be below average this weekend with the
colder airmass moving in, with highs in the teens and 20s for the Northern
Rockies; 30s and 40s for the Pacific Northwest, northern California, the
Great Basin, and central Rockies; 50s for central California; and 60s for
southern California. Temperatures will be warmer into the Southwest with
highs in the 70s.

Along the East Coast, a low pressure system tracking along a coastal front
up the Mid-Atlantic coast continues to bring widespread rainfall across
New England into tonight.  This system is forecast to move east of Cape
Cod on Sunday, gradually bringing the rain out into the Atlantic later on
Sunday.  However, the trailing portion of the front is forecast to become
stationary just off the coast of the southeastern U.S. where another wave
of low pressure is forecast to develop.  

Widespread well above average, Spring-like temperatures are forecast to
continue for much of the Plains and Midwest for the remainder of the
weekend into Monday. The greatest anomalies will be centered over portions
of the central/northern Plains and Upper Midwest Saturday, spreading into
the Great Lakes and Middle Mississippi/Ohio Valleys on Sunday, where
forecast highs reaching well into the 60s and 70s are upwards of 25-35
degrees above average.